TY  - RPRT
TI  - Crystalline rocks of the Potomac River Gorge near Washington, D.C.
AU  - John Calvin Reed
AU  - Janice Jolly
PY  - 1963
DO  - 10.3133/pp414h
UR  - https://pubs.usgs.gov/publication/pp414H
ID  - pp414H
ER  -